Now showing items 1-11 of 11

    • ALMA Reveals Sequential High-mass Star Formation in the G9.62+0.19 Complex 

      Liu, Tie; Lacy, John; Li, Pak Shing; Wang, Ke; Qin, Sheng-Li; Zhang, Qizhou; Kim, Kee-Tae; Garay Brignardello, Guido; Wu, Yuefang; Mardones, Diego; Zhu, Qingfeng; Tatematsu, Ken'ichi; Hirota, Tomoya; Ren, Zhiyuan; Liu, Sheng-Yuan; Chen, Huei-Ru; Su, Yu-Nung; Li, Di (IOP Publishing Ltd, 2017)
      Stellar feedback from high-mass stars (e.g., H II regions) can strongly influence the surrounding interstellar medium and regulate star formation. Our new ALMA observations reveal sequential high-mass star formation taking ...
    • Astrochemical Properties of Planck Cold Clumps 

      Tatematsu, Ken'Ichi; Liu, Tie; Ohashi, Satoshi; Sanhueza, Patricio; Nguyen Lu'O'Ng, Quang; Hirota, Tomoya; Liu, Sheng Yuan; Hirano, Naomi; Choi, Minho; Kang, Miju; Thompson, Mark A.; Fuller, Gary; Wu, Yuefang; Li, Di; Francesco, James Di; Kim, Kee Tae; Wang, Ke; Ristorcel (Institute of Physics Publishing, 2017)
      © 2017. The American Astronomical Society. All rights reserved.. We observed 13 Planck cold clumps with the James Clerk Maxwell Telescope/SCUBA-2 and with the Nobeyama 45 m radio telescope. The N2H+ distribution obtained ...
    • Discovery of an extremely wide-angle bipolar outflow in afgl 5142 

      Liu, Tie; Zhang, Qizhou; Kim, Kee-Tae; Wu, Yuefang; Lee, Chang-Won; Goldsmith, Paul F.; Li, Di; Liu, Sheng-Yuan; Chen, Huei-Ru; Tatematsu, Ken'ichi; Lee, Jeong-Eun; Qin, Sheng-Li; Mardones Pérez, Diego; Cho, Se-Hyung (2016-06-10)
      Most bipolar outflows are associated with individual young stellar objects and have small opening angles. Here we report the discovery of an extremely wide-angle (similar to 180 degrees) bipolar outflow ("EWBO") in a cluster ...
    • Dust-gas scaling relations and oh abundance in the galactic ISM 

      Nguyen, Hiep; Dawson, J.; Miville-Deschenes, M.-A.; Tang, Ningyu; Li, Di; Heiles, Carl; Murray, Claire; Stanimirovic, Snezana; Gibson, Steven; McClure-Griffiths, N.; Troland, Thomas; Bronfman Aguiló, Leonardo; Finger Camus, Ricardo (IOP Publishing, 2018-07-20)
      Observations of interstellar dust are often used as a proxy for total gas column density N-H. By comparing Planck thermal dust data (Release 1.2) and new dust reddening maps from Pan-STARRS 1 and 2MASS, with accurate ...
    • Dust-Gas Scaling Relations and OH Abundance in the Galactic ISM 

      Nguyen, Hiep; Dawson, J. R.; Miville-Deschenes, M. A.; Tang, Ningyu; Li, Di; Heiles, Carl; Murray, Claire E.; Stanimirović, Snežana; Gibson, Steven J.; McClure-Griffiths, N. M.; Troland, Thomas; Bronfman, L.; Finger, R. (Institute of Physics Publishing, 2018)
      © 2018. The American Astronomical Society. All rights reserved.Observations of interstellar dust are often used as a proxy for total gas column density N H. By comparing Planck thermal dust data (Release 1.2) and new dust ...
    • Extremely Energetic Outflow and Decelerated Expansion in W49N 

      Liu, Tie; Kim, Kee-Tae; Wu, Yuefang; Li, Di; Lee, Chang-Won; Pree, Christopher De; Qin, Sheng-Li; Wang, Ke; Tatematsu, Ken’ichi; Zhang, Qizhou; Mardones Pérez, Diego; Liu, Sheng-Yuan; Cho, Se-Hyung (The American Astronomical Society, 2015-09-10)
      W49N is a mini-starburst in the Milky Way and is thus an ideal laboratory for high-mass star formation studies. Due to its large distance (11.1 0.7 0.9 - + kpc), the kinematics inside and between the dense molecular ...
    • Follow-up Observations Toward Planck Cold Clumps with Ground-Based Radio Telescopes 

      Liu, Tie; Wu, Yuefang; Mardones Pérez, Diego; Kim, Kee-Tae; Menten, Karl; Tatematsu, Ken; Cunningham, Maria; Juvela, Mika; Zhang, Qizhou; Goldsmith, Paul; Liu, Sheng-Yuan; Zhang, Hua-Wei; Meng, Fanyi; Li, Di; Lo, Nadia; Guan, Xin; Yuan, Jinghua; Belloche, Arnaud; Henkel, Christian; Wyrowski, Friedrich; Garay Brignardello, Guido; Ristorcelli, Isabelle; Lee, Jeong-Eun; Wang, Ke; Bronfman Aguiló, Leonardo; Toth, L.; Schnee, Scott; Qin, Shengli; Akhter, Shaila (The Korean Astronomical Society, 2015-09)
      The physical and chemical properties of prestellar cores, especially massive ones, are still far from being well understood due to the lack of a large sample. The low dust temperature (< 14 K) of Planck cold clumps makes ...
    • Planck cold clumps in the lambda orionis complex. I. Discovery of an extremely young class 0 protostellar object and a proto-brown dwarf candidate in the bright-rimmed clump pgcc g192.32-11.88 

      Liu, Tie; Zhang, Qizhou; Kim, Kee-Tae; Wu, Yuefang; Lee, Chang Won; Lee, Jeong-Eun; Tatematsu, Kenichi; Choi, Minho; Juvela, Mika; Thompson, Mark; Goldsmith, Paul F.; Liu, Sheng-yuan; Naomi, Hirano; Koch, Patrick; Henkel, Christian; Sanhueza, Patricio; He, JinHua; Rivera-Ingraham, Alana; Wang, Ke; Cunningham, María R.; Tang, Ya-Wen; Lai, Shih-Ping; Yuan, Jinghua; Li, Di; Fuller, Gary; Kang, Miju; Luong, Quang Nguyen; Liu, Hauyu Baobab; Ristorcelli, Isabelle; Yang, Ji; Xu, Ye; Hirota, Tomoya; Mardones Pérez, Diego; Qin, Sheng-Li; Chen, Huei-Ru; Kwon, Woojin; Meng, Fanyi; Zhang, Huawei; Kim, Mi-Ryang; Yi, Hee-Weon (IOP Publisihing, 2016)
      We are performing a series of observations with ground-based telescopes toward Planck Galactic cold clumps (PGCCs) in the lambda Orionis complex in order to systematically investigate the effects of stellar feedback. In ...
    • Star formation laws in both galactic massive clumps and external galaxies: extensive study with dust coninuum, HCN (4-3), AND CS (7-6) 

      Liu, Tie; Kim, Kee-Tae; Yoo, Hyunju; Liu, Sheng-yuan; Tatematsu, Ken'ichi; Qin, Sheng-Li; Zhang, Qizhou; Wu, Yuefang; Wang, Ke; Goldsmith, Paul; Juvela, Mika; Lee, Jeong-Eun; Tóth, L. Viktor; Mardones Pérez, Diego; Garay Brignardello, Guido; Bronfman Aguiló, Leonardo; Cunningham, Maria; Li, Di; Lo, Nadia; Ristorcelli, Isabelle; Schnee, Scott (The American Astronomical Society, 2016-10-01)
      We observed 146 Galactic clumps in HCN (4-3) and CS (7-6) with the Atacama Submillimeter Telescope Experiment 10 m telescope. A tight linear relationship between star formation rate and gas mass traced by dust continuum ...
    • Where is OH and Does It Trace the Dark Molecular Gas (DMG)? 

      Li, Di; Tang, Ningyu; Nguyen, Hiep; Dawson, J. R.; Heiles, Carl; Xu, Duo; Pan, Zhichen; Goldsmith, Paul F.; Gibson, Steven J.; Murray, Claire E.; Robishaw, Tim; McClure-Griffiths, N. M.; Dickey, John; Pineda, Jorge; Stanimirović, Snežana; Bronfman, L.; Troland, Thomas (Institute of Physics Publishing, 2018)
      © 2018. The American Astronomical Society. All rights reserved.. Hydroxyl (OH) is expected to be abundant in diffuse interstellar molecular gas because it forms along with H2 under similar conditions and forms within a ...
    • Where is OH and does It trace the Dark Molecular Gas (DMG)? 

      Li, Di; Tang, Ningyu; Nguyen, Hiep; Dawson, J. R.; Heiles, Carl; Xu, Duo; Pan, Zhichen; Goldsmith, Paul F.; Gibson, Steven J.; Murray, Claire E.; Robishaw, Tim; McClure-Griffiths, N. M.; Dickey, John; Pineda, Jorge; Stanimirovic, Snezana; Bronfman Aguiló, Leonardo; Troland, Thomas (IOP Publishing Ltd, 2018)
      Hydroxyl (OH) is expected to be abundant in diffuse interstellar molecular gas because it forms along with H-2 under similar conditions and forms within a similar extinction range. We have analyzed absorption measurements ...